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Failed to open email account: Sending of username did not succeed. Mailserver pop3.mail.dk replied: invalid command

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  • Letzte Antwort von sfhowes

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I keep getting the following error message when opening my Thunderbird e-mail desktop application: Sending of username did not succeed. Mailserver pop3.mail.dk replied: invalid command

What could the problem be and what is the solution?

Thank you in advance

I keep getting the following error message when opening my Thunderbird e-mail desktop application: ''Sending of username did not succeed. Mailserver pop3.mail.dk replied: invalid command'' What could the problem be and what is the solution? Thank you in advance
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What are your settings? They recommend:

incoming POP: pop3.mail.dk, 995, SSL/TLS, normal password, User Name = email address

incoming IMAP: imap.mail.dk, 993, SSL/TLS, normal password, User Name = email address

outgoing SMTP: asmtp.mail.dk, 587, STARTTLS, normal password, User Name = email address

If you have those and it doesn't work, state your antivirus (if it's not Windows/MS Security) and VPN if applicable.